Cholecystocolic fistula secondary to gallbladder carcinoma: a rare case.

Internal biliary fistulae are a well-recognized complication of biliary lithiasis. Among these, the cholecystoduodenal fistulae are the commonest while cholecystocolic fistulae (CCF) occur much less frequently. CCF secondary to gallbladder carcinoma is a rare occurrence and has been reported in very few studies. Here, the author reports a case of cholecystocolic fistula secondary to gallbladder carcinoma. Preoperative diagnosis of this condition requires high index of suspicion and is usually difficult. Computed tomography scan is helpful in establishing a preoperative diagnosis.